Apr 1, 2025 · Allergies are your immune system’s overreaction to foreign substances. When you touch, inhale or eat something you’re allergic to, your body thinks it’s harmful and reacts to try to get rid of it. …

Aug 24, 2024 · Allergies happen when the immune system reacts to a foreign substance that gets inside the body. These substances are known as allergens. They include pollen, bee venom and pet …

Dust mite allergy, also known as house dust allergy, is a sensitization and allergic reaction to the droppings of house dust mites. The allergy is common [41][42] and can trigger allergic reactions such …

Jul 7, 2025 · An allergy is an immune system response to a foreign substance that’s not typically harmful to your body. Learn more about the types, causes, and symptoms of allergies, and how they're treated.

Nov 19, 2025 · Allergies can cause a variety of symptoms such as a runny nose, sneezing, itching, rashes, swelling, or asthma. Allergies can range from minor to severe. Anaphylaxis is a severe …

Nov 20, 2023 · In many places in the U.S., there are two allergy seasons: spring and fall. Allergies that you get at similar times each year (seasonal allergies) are usually caused by pollen from trees,...

Read about allergy treatment, symptoms, testing, shots, and medicine. Learn about the types of allergies (asthma, allergic rhinitis, seasonal, conjunctivitis, eczema, anaphylaxis, hives) causes, risk …

May 19, 2024 · An allergy is a treatable condition in which the body has a reaction—ranging from hives to trouble breathing—to allergens like food, pollen, or dust.

Apr 1, 2025 · An allergy is when your immune system over reacts to a harmless substance and lets out a chemical in your body called histamine. Histamine can make your nose run, eyes water, and more.

2 days ago · Today’s National Allergy Map Search, browse and select cities on our interactive allergy map to see allergy levels and pollen count forecasts.